Abscission
Abscission (pronounced: ab-SIZH-uhn) is a biological process in plants where parts such as leaves, fruits, or flowers are shed off, usually to conserve resources and protect the plant from diseases. The term is derived from the Latin word "abscissio", meaning "cutting off".
Etymology
The term "abscission" comes from the Latin "abscissio", which means "cutting off". It is composed of "ab-", a prefix meaning "away", and "-scissio", a suffix related to "scindere", meaning "to cut".
Process
The process of abscission involves the formation of an abscission zone, where cells actively divide and then separate, allowing for the detachment of the leaf or fruit. This process is regulated by several plant hormones, including ethylene, auxin, and abscisic acid.
Related Terms
- Abscission zone: The area at the base of a plant organ, such as a leaf, fruit, or flower, where abscission occurs.
- Ethylene: A plant hormone that promotes fruit ripening and abscission.
- Auxin: A plant hormone that, among other roles, can inhibit abscission.
- Abscisic acid: A plant hormone that can promote leaf and fruit abscission.
See Also
External links
- Medical encyclopedia article on Abscission
- Wikipedia's article - Abscission
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